• Quantifying soil–plant water relations via operational thresholds and physical models became central, defining metrics like the wilting coefficient and linking capillary cohesion to plant stress and irrigation decisions [3], [5], [17], [18].

• Nutrient essentiality and bioavailability were framed as system constraints, from proving micronutrients indispensable to plants to measuring human utilization of vegetable calcium and phosphorus, guiding soil and diet management [2], [9], [10], [11].

• Pasture was treated as a managed production system: seasonal botanical–chemical dynamics and grazing intensity were quantified to predict yield and feed quality, complemented by digestibility trials to connect forage composition to livestock performance [1], [4], [6], [12], [16].

• Experimental agronomy emphasized trait-based improvement and variance analysis, linking organ development and root architecture to yield, standardizing field trials, and informing breeding distinctions among cereals for stable productivity [7], [8], [13], [14], [19].

• Researchers framed environmental and regional heterogeneity as economic production constraints, contrasting soils and regions to guide management and policy—from weed pressure and soil type contrasts to global agricultural mapping [6], [12], [15], [20].