Introduction Low soil fertility and high fertilizer costs are constraints to wheat production, which may be resolved with integrating phosphorus (P) farm-yard manure (FYM). Study objectives were evaluate P source impacts on soil, efficiency, growth in a calcareous soil. Methods Treatments included (0, 17, 26, or 39 kg ha-1) and/or FYM (0 10 T a: 1) incubation experiment 2) (Triticum aestivum spp.) field experiment. Results Discussion Soil organic matter increased (30-72%) linearly for both...

The discovery and development of phosphorus (P) P fertilizers provide context for current management conventions. Average crop yields were stagnant before the Green Revolution but have steadily increased since. This, along with conventional management, has resulted in widely depleting soil levels. Improved technology are needed to meet increasing demand. Modern hybrids cultivars different demand uptake patterns that require changes fertilizer placement timing. Phosphorus recommendations...

Controlled-release and slow-release fertilizers can effectively supply nitrogen (N) while mitigating N loss. To determine the suitability of these for plants in semi-arid environments, need to be evaluated under varying placement temperature conditions. Several urea were evaluated, including: uncoated, sulfur-coated (SCU), polymer-coated-sulfur-coated (PCSCU), polymer-coated (PCU) with projected release timings between 45 180 d. Nitrogen was measured daily fluctuating or static temperatures...

The improvement of fertilizer efficiency is driven by narrow profit margins, environmental concerns, and resource conservation. Fertile soil the foundation for food production successful civilizations; it developed maintained through addition nutrients lost harvest. However, nutrient uptake plants inherently inefficient remaining in after can cause negative air water impacts. In addition, poor a waste natural resources potentially reduces yields, crop quality, grower profits. Enhancing...

Soil water repellency is commonly found in piñon ( Pinus spp.)–juniper Juniperus spp.) (P‐J) woodlands and may limit site recovery after a fire. Understanding the extent of this problem impact it has on vegetation will help guide land managers conducting their restoration efforts. In study, we (i) examined spatial distribution severity post‐fire soil burned P‐J woodland, (ii) related ecohydrologic properties to pre‐fire tree canopy cover establishment, (iii) demonstrated geographic...

Polymer coated urea (PCU) is a N fertilizer which, when added to moist soil, uses temperature-controlled diffusion regulate release in matching plant demand and mitigate environmental losses. Uncoated PCU were compared for their effects on gaseous (N2O NH3) aqueous (NO3-) losses cool season turfgrass over the entire N-release period. Field studies conducted established sites with mixtures of Kentucky bluegrass (Poa pratensis L.) perennial ryegrass (Lolium perenne sand loam soils. Each study...

Abstract Zinc (Zn) deficiency is more common in corn (Zea mays L.) than sorghum [Sorghum bicolor (L.) Moench] or wheat (Triticum sp.). The ability of to withstand low soil Zn conditions related increased release phytosiderophore from its roots. reasons for sorghum's and corn's inability utilize levels have not been explored adequately. objectives this research were 1) ascertain if could be induced sorghum, wheat, grown a chelator‐buffered nutrient solution 2) determine relative releases...

High intensity wildfires in semiarid shrub and woodland plant communities can leave ecosystems incapable of self-repair susceptible to weed invasion. Subsequently, land managers need effective restoration tools reseed native vegetation back into these degraded systems. In order develop successful post-fire approaches communities, it is critical that we understand the mechanisms impair reseeding success. Our objective was quantify influence soil water repellency on seedling emergence growth a...

Maize (Zea mays L.) is common in potato (Solanum tuberosum cropping systems and especially susceptible to zinc (Zn) deficiency, possibly related induced demand for high phosphorus (P). Three chelator-buffered nutrient solution experiments were evaluated maize response establish ranges of deficient, sufficient, excessive Zn P evaluate interactions. Zinc concentrated roots manganese (Mn) accumulated shoots as increased, but only 32 μM produced significantly lower shoot than other treatments...

This study examines the use of leaf area index (LAI) to inform variable-rate irrigation (VRI) for irrigated alfalfa (Medicago sativa). LAI is useful predicting zone-specific evapotranspiration (ETc). One approach toward estimating utilize relationship between and visible vegetation indices (VVIs) using unmanned aerial vehicle (UAV) imagery. research has three objectives: (1) measure describe within-field variation in canopy height an field, (2) evaluate relationships various VVIs with...

In this study, alfalfa (Medicago sativa L.) is evaluated for suitability of variable rate irrigation (VRI) by analyzing within-field variation in crop water productivity (CWP) under uniform irrigation. The objectives were to (1) measure evapotranspiration (ET), (2) quantify spatial variability biomass yield, and (3) assess whether a bivariate analysis CWP yield could inform VRI management zones. Research was conducted on 22.6 ha center-pivot irrigated field near Rexburg, Idaho, USA, over...

Abstract Nutrient deficiencies may be common due to over irrigation, especially with sand‐based sports fields and golf greens. Recent innovations in sensor technology enable precise, simultaneous measurements of soluble salts via electrical conductivity (EC), which related short‐term availability nutrients. The objectives this study are correlate pore water EC soil grass nutrient concentrations, comparing distinct types fertilizer application rates. Preliminary results suggest a correlation...

High phosphorus (P) application in potato production potentially leads to antagonistic interactions with cationic micronutrients. None of the nine combinations and zinc (Zn) provided chelator-buffer solution for 17 days supported concept a P-induced Zn deficiency regard early season dry matter yield, especially when P ranged from sufficient excessive—conditions under which P-Zn interaction traditionally is observed. Increased at low levels resulted steep increase new old shoot growth an...

Three hydroponic experiments were conducted with Russet Burbank potato to elucidate zinc (Zn) and manganese (Mn) relationships associated interactions other nutrients at different levels of phosphorus (P). Except when P was optimal, root Mn concentration reduced optimal solution Zn relative deficient or excessive levels. Shoot generally increased augmented Zn. As increased, declined while shoot copper (Cu) iron (Fe) Cu increased. Increasing decreased in all plant tissues—especially roots....

Potato (Solanum tuberosum L.) has surface roots with enhanced activity upon canopy closure that should allow application of phosphorus (P) via fertigation. Fertilizer trials were conducted in 2005–2006 four pre-plant broadcast (0, 112, 224, or 336 kg P2O5 ha−1) and two split applied in-season fertigation (0 56 rates. Total undersized tuber yield had a quadratic relationship P, increasing then declining as P fertilizer rate increased, predicted peaks at 246 167 ha−1, respectively. Marketable...

Manganese (Mn)- and zinc (Zn)-driven antagonistic interactions with high available phosphorus (P) can result in negative impacts on potato cropping systems. Two chelator-buffered hydroponic experiments were conducted Russet Burbank to elucidate P Mn relationships associated Zn. In both experiments, a concentration decline new shoots, old roots resulted as solution changed from deficient sufficient followed by rise excessive concentrations. New shoot Zn concentrations generally increased...

Improving P use efficiency (PUE) is desirable but difficult due to poor phosphorus (P) solubility in soils. A dicarboxylic acid copolymer (AVAIL®) fertilizer additive may enhance PUE. Monoammonium phosphate (MAP) at 67 kg P2O5 ha−1 was applied with or without AVAIL addition compared an untreated check potato on five field sites. MAP + resulted significant US No. 1 and total yield increases two three sites, respectively. Generally, the other sites showed similar trends. However, a decrease...

Application of mineral nutrients to improve plant health is critical providing food and fiber. Potato (Solanum tuberosum L.) among the most responsive species N application but susceptible biotic abiotic stresses. Nitrogen-stress relationships are generally evaluated indirectly during field fertility trials designed for collection agronomic data. A controlled environment system would benefit understanding nutrition-stress interactions. Environmental chamber hydroponics allows strict...

Core Ideas Meta‐analysis shows a significant yield increase of 2.1% with AVAIL+P fertilizer. Many AVAIL studies were not conducted under P responsive conditions. Likelihood response increases low soil test and rate extreme pH. Average to 4.6% when only likely respond sites included. Enhanced efficiency fertilizer should be evaluated AVAIL, maleic‐itaconic copolymer acid marketed enhance fertilizers, has been studied on variety crop species. Data from all known field comparing fertilization...