Purpose: Over and under dose application and of nitrogen (N) and phosphorus (P) leads to inferior growth and yield reduction in field crops. Different nutrients have synergetic and antagonistic effects according to soil properties, climate, crop type and management practices at the same time. Research Methods: In this field study, we tried to explore the combined effect of N and P on peanut phenology, yield and soil N and P status. Three N (N1=20, N2=40, N3=60 kg ha-1) and three P (P1=60, P2=80, P3=100kg ha-1) application rates were applied in a split-plot complete randomized design in 2016 and 2017 growing seasons of peanut, while after harvesting of peanut field was fallow. Findings: Our results demonstrated that combined or individual application of N and P not affected phenophases of peanuts (germination, flowering and pegging) except physiological maturity, and a low rate of N application increased maturity duration time in peanut. While pod production in low N doses was more as compared to high dose application of N and P, except N3P2 in both years, a greater number of pods attained less grain weight and lower yield. Concurrently, a higher dose of N and P individually produced higher yield (2614, 2647 in N3, 2549, 2527 kg ha-1 in N2) and lower yield was quantified 2216 and 2205 in N1 in both years (2016-2017) respectively. Similarly, 2658, 2647, and 2496, 2507 kg ha-1 were weighted in P3 and P2 respectively. But their combined effect was non-significant (P0.05). In the case of soil total N and available P, N increment doubled (~0.8 g kg-1) as compared to initial N status regardless of N application rate but P had no effect on available P contents in upper soil (0-15 cm) surface. So, peanut cultivation can be a promising strategy for N increment in a semi-arid area of Pakistan. Limitations: Due to the limited availability of funds, we analyzed areas of topsoil (0-15). It will be better to do soil analysis in depth for further studies. These findings are valuable for researchers, farmers, and regional agriculture departments, because alternation in nitrogen rate application didn’t change the soil N level with the combination of phosphorus in peanut. So, Findings suggested that low N application was enough for peanut cultivation. Nitrogen and phosphorus have a significant effect on the growth and yield of peanuts. Peanut crop needs the half amount of nitrogen than phosphorus because it is a leguminous crop and has nitrogen factories in the root nodules.

In farming and related fields, numerous connections exist that should be distinguished quantitatively. Several factors affect the various crop yields in different dimensions. These factors may have relation with farmer’s practices or with quality of soil. In this study, our main focus is to explore the effect of soil and other factors on the wheat yield. Regression modeling plays an important role in the identification of such factors that greatly affect the crops yield. For reliable and valid results, one has to check the data for outliers and other critical results. In this study, we have fitted the regression models with and without satisfying some regression assumptions to determine the factors affecting yield of wheat. For analysis purposes, the required data were collected from the district Multan. It was observed that when the regression assumptions were satisfied, then coefficient of determination (R2) was improved from 45% to 48%, R2 (adjusted) was improved from 40% to 46%, and the standard error of the estimates was reduced from 2.772 to 2.649. These results indicate that the soil characteristics, such as saturation, electrical conductivity, organic matter, phosphorus, potassium, calcium carbonate, and micronutrients (zinc, copper, iron, manganese, and boron), are the significant factors for wheat yield. While among all other factors, urea, chemical coating of seed, use of compost, and previously sown crops are the significant factors for wheat yield.

Rice (Oryza sativa L) is an important source of food, as the population of the world is increasing the additional supply of rice is requisite to feed the population. Moringa leaf extract, salicylic acid and zinc sulphate are excellent growth regulators used worldwide. A field experiment was conducted on rice at Bahauddin Zakariya University, Multan, Pakistan. Fine rice (super basmati) was sown by two methods (S1= transplanting method and S2= direct-seeded rice) supplied with three growth regulators G1= moringa leaf extract (30 times diluted), G2= salicylic acid (50 mg per liter) and G3= zinc sulphate (50 g per liter) as foliar applications and G0devised as control treatment. Foliar application of growth regulators to respective treatments was done at two stages (before and after flowering). Data regarding growth (crop growth rate, photosynthetic rate and stomatal conductance), yield (number of grains per panicle, thousand grains weight, grain yield, biological yield and harvest index) and quality (normal kernel, sterile kernel, amylose contents, protein contents and brown rice rate) were studied. Compiled results of the study showed that moringa leaf extract along with the transplanting method performed better in most of the parameters than all other treatments. Transplanting with salicylic acid gave better results in the normal kernel, amylose contents and protein contents whereas zinc sulphate gave better results in brown rice rate.