UPMSP Intermediate Agricultural Chemistry case studies
UPMSP Intermediate Agricultural Chemistry · Put your knowledge to work in context.
UPMSP Intermediate Agricultural Chemistry (Krishi Rasayan Vigyan) is a Class 12 elective subject examination offered under the Uttar Pradesh Madhyamik Shiksha Parishad (UP Board) intermediate curriculum. It is intended for students who have chosen the agriculture stream and who want a science-based grounding in how soils, nutrients, fertilizers and agro-chemicals actually behave, rather than a purely descriptive agriculture course. The UPMSP Intermediate Agricultural Chemistry case studies are 5 cases and about 3,101 words.
1Gypsum on a sodic patch: how much and where?
A 1.0 ha wheat field in a canal command has pH 9.2 (1:2.5 soil:water), EC 0.8 dS/m, ESP 24% and CEC 16 cmol/kg. Infiltration is only 4 mm/h and a 0.35 ha patch shows yellowing, crusting and poor tillering; the rest of the field is better but still patchy.
697 words, about 3 min2A high-phosphorus soil test and a low-zinc maize crop
A farmer has a 1.0 ha sandy loam field with pH 7.8, organic carbon 0.45%, available N 180 kg/ha, available P2O5 52 kg/ha (high), available K2O 210 kg/ha (medium) and DTPA-Zn 0.32 mg/kg (critical level 0.60). He plans maize with a state recommendation of 120 kg N, 60 kg P2O5 and 40 kg K2O per hectare.
654 words, about 3 min3Spray or wait? A pre-harvest interval decision in okra
Okra on 0.4 ha is at first picking; fruit borer larvae average two per plant and 8% of fruits are damaged. The main harvest for a local festival is six days away, and the buyer will reject spotted fruit but not test residue.
575 words, about 3 min4Wastewater irrigation and a spinach crop near a drain
A 0.5 ha spinach plot on the edge of a city has been irrigated for six years with sewage water from a drain that also receives electroplating and battery-repair waste. The soil is pH 5.9, organic carbon 1.1%, and has 2.8 mg/kg Cd, 85 mg/kg Pb and 210 mg/kg Zn (aqua-regia extract).
555 words, about 3 min5Converting to organic basmati: can the nutrient budget close?
A farmer is converting 2 ha to certified organic basmati rice in the first of three conversion years. The field has organic carbon 0.50%, available N 160 kg/ha, available P 18 kg/ha and available K 150 kg/ha.
620 words, about 3 min