Soil Problems Soil compaction / poor aeration Mild Medium Severe Soil Problems Low soil organic matter Mild Medium Severe Soil Problems Poor water and nutrient retention Mild Medium Severe Soil Problems Abnormal soil pH (too acidic / alkaline) Mild Medium Severe Soil Problems High soil EC / salinity Mild Medium Severe Soil Problems NPK and micronutrient deficiency or imbalance Mild Medium Severe Soil Problems Low soil microbial activity Mild Medium Severe Soil Problems Soil heavy metal risk Mild Medium Severe Soil Problems Severe continuous cropping problems Mild Medium Severe Root Problems Poor root development / few white roots Mild Medium Severe Root Problems Root infectious diseases Mild Medium Severe Root Problems Root damage (mechanical, fertilizer, chemical or cold injury) Mild Medium Severe Root Problems Root pests (insects, nematodes, root-knot nematodes, etc.) Mild Medium Severe Root Problems Root physiological / metabolic disorders Mild Medium Severe Root Problems Root degradation caused by plant autotoxins Mild Medium Severe Root Problems Repeated root diseases Mild Medium Severe Stem Problems Excessive stem growth or long internodes Mild Medium Severe Stem Problems Stem vascular tissue disorders Mild Medium Severe Stem Problems Stem diseases or injuries Mild Medium Severe Leaf Problems Yellowing / chlorosis Mild Medium Severe Leaf Problems Small, thin, curled or deformed leaves Mild Medium Severe Leaf Problems Clear nutrient deficiency symptoms on leaves Mild Medium Severe Leaf Problems Premature leaf senescence Mild Medium Severe Leaf Problems Slow recovery from chemical, fertilizer or cold injury Mild Medium Severe Leaf Problems Leaf infectious diseases Mild Medium Severe Flower / Fruit Problems No flowering, few flowers or weak flowers Mild Medium Severe Flower / Fruit Problems Low fruit setting after flowering Mild Medium Severe Flower / Fruit Problems Severe natural fruit drop Mild Medium Severe Flower / Fruit Problems Slow fruit enlargement Mild Medium Severe Flower / Fruit Problems Uneven fruit size and poor marketable rate Mild Medium Severe Flower / Fruit Problems Cracking / deformed / hollow fruit Mild Medium Severe Yield Problems Low and unstable yield Mild Medium Severe Yield Problems Insufficient effective flowers / fruits Mild Medium Severe Yield Problems Low single fruit weight Mild Medium Severe Yield Problems Short harvest period and late-season senescence Mild Medium Severe Quality Problems Low sugar / dry matter Mild Medium Severe Quality Problems Poor firmness or storage / transport tolerance Mild Medium Severe Quality Problems Unsatisfactory appearance, color or taste Mild Medium Severe Quality Problems Uneven size and low marketable rate Mild Medium Severe Irrigation Water Problems High irrigation water EC Mild Medium Severe Irrigation Water Problems Abnormal irrigation water pH Mild Medium Severe Irrigation Water Problems Hard water / high carbonate content Mild Medium Severe Irrigation Water Problems Drip system clogging or scaling Mild Medium Severe Irrigation Water Problems Unstable water source Mild Medium Severe Other Stress Problems Low temperature / frost Mild Medium Severe Other Stress Problems High temperature / hot dry wind Mild Medium Severe Other Stress Problems Drought / water shortage Mild Medium Severe Other Stress Problems Salinity-alkalinity stress Mild Medium Severe Other Stress Problems High pest and disease pressure Mild Medium Severe Other Stress Problems Other problem Mild Medium Severe